JP2006019920A - Mobile terminal and mobile terminal cover used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile terminal capable of reducing a peak temperature of a heat generating source without giving effect on an outward appearance of the mobile terminal and to provide a mobile terminal cover used for the mobile terminal. <P>SOLUTION: In the mobile terminal 100 wherein a display section 13 and an operation section 23 are arranged on the front side of casings 1, 2 and at least the rear side of the cases 1, 2 is covered by the mobile terminal cover B, a thermal diffusion sheet member is provided between the rear side of the casings 1, 2 and the mobile terminal cover B, and the thermal diffusion sheet member is connected to the heat generating source provided to the casings 1, 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a portable terminal and a portable terminal cover used therefor.

In recent years, a large number of mobile phones have been developed and used. In addition to a straight type having a simple bar shape, various types of folding types that can be opened and closed via a hinge portion have been developed.
The foldable mobile phone includes an upper casing having a display section, a lower casing having an operation section, and a hinge section that connects the upper and lower casings so that the display section and the operation section face each other in an openable and closable manner. It has a structure in which the upper and lower casings are relatively rotated and folded around the axial center of the hinge portion.
On the other hand, a connecting portion that connects an upper housing having a display portion and a lower housing having an operation portion is formed into a foldable belt shape that is thinner than the thickness of the upper and lower housings (hereinafter referred to as this). There is also a proposal (referred to as Patent Document 1). This foldable mobile phone is a foldable mobile phone in that the foldable mobile phone can be opened and closed via a hinge portion, but can be folded using the flexibility of the belt-like connecting portion. Different from the phone.

Design Registration No. 1161572

In any case, a straight-type mobile phone, a foldable mobile phone, or a fold-type mobile phone has a heat source such as a wireless power amplifier and a charging component built in the housing. Conventionally, because these heat sources have a large board area on which the heat source is mounted, there was a heat dissipation effect on the entire surface, and there was a gap of about several millimeters between the casing made of ABS resin, It was difficult for heat to conduct to the housing surface. However, along with the rapid miniaturization and thinning of mobile phone devices, the mounting board has become smaller and the heat-generating components and the housing have become closer, which not only increases the heat conduction to the housing, There was a disadvantage of generating localized fever. Also, in recent years, mobile phone covers (hereinafter referred to as “fashion covers”) may be attached to mobile phones depending on the purpose of improving design and user preferences. In the case with such a fashion cover, heat dissipation is further reduced and heat is trapped, which may increase the exothermic peak temperature. On the other hand, if a heat dissipation means with a large area is exposed on the housing, the heat dissipation efficiency of the heat source is increased, but the appearance (design) of the portable terminal is impaired.
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a portable terminal capable of lowering the peak temperature of the heat generation source without affecting the appearance of the portable terminal and a portable terminal cover used therefor.

  In order to achieve the above object, a mobile terminal according to the present invention is a mobile terminal in which a display unit and an operation unit are disposed on a front surface of a housing, and at least a back surface of the housing is covered with a cover for mobile terminal, A heat diffusion sheet member is provided between a back surface of the housing and the portable terminal cover, and the heat diffusion sheet member is connected to and in close proximity to a heat source provided in the housing. .

  In this portable terminal, when the heat source generates heat, the heat is transmitted to the heat diffusion sheet member, and is diffused in the surface direction to be radiated. Therefore, conventionally, the locally concentrated heat is diffused, and the peak temperature of the heat source is lowered. In addition, the heat diffusion sheet member is accommodated by utilizing the gap between the back surface of the housing and the cover for the mobile terminal, so that the heat diffusion sheet member having a large area and high heat dissipation efficiency is added to the appearance (design) of the mobile terminal. It can be accommodated without affecting.

  A portable terminal cover according to the present invention is a portable terminal cover that covers at least the back surface of a casing having a display unit and an operation unit disposed on a front surface thereof, and is provided with a heat diffusion sheet member on a base material. The diffusion sheet member is connected to a heat source provided in the housing.

  In this portable terminal cover, when the heat generation source generates heat, the heat is transmitted to the heat diffusion sheet member and is diffused in the surface direction to be radiated. Therefore, conventionally, the locally concentrated heat is diffused, and the peak temperature of the heat source is lowered. Further, since the heat diffusion sheet member is provided on the cover for the portable terminal, the number of parts and the part cost inside the portable terminal do not increase.

  According to the mobile terminal according to the present invention, the heat diffusion sheet member is provided between the back surface of the housing and the cover for the mobile terminal, and the heat diffusion sheet member is connected to the heat source provided in the housing. When the source generates heat, the heat is transmitted to the thermal diffusion sheet member, diffused in the surface direction, and radiated. Therefore, the heat that has been concentrated locally in the past is diffused, and the peak temperature of the heat source can be lowered without affecting the appearance (design) of the mobile terminal.

  According to the portable terminal cover according to the present invention, the base plate is provided with a heat diffusion sheet member, the heat diffusion sheet member is connected to the heat source provided in the housing, and is in close proximity, so when the heat source generates heat, Heat is transferred to the thermal diffusion sheet member, diffused in the surface direction and radiated. Therefore, the heat that has been concentrated locally in the past is diffused, and the peak temperature of the heat source can be lowered without affecting the appearance (design) of the mobile terminal. Further, since the heat of the heat source is diffused by the heat diffusion sheet member provided on the mobile terminal cover, the number of parts and parts cost of the mobile terminal are not increased.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a portable terminal and a portable terminal cover used therefor according to the present invention will be described with reference to the drawings.
1 is a perspective view showing the appearance of a portable terminal according to the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a perspective view of the main body of FIG. 1 viewed from the back, and FIG. The main body part of the open state of the portable terminal which concerns on invention, and the connection apparatus provided in this are shown, (b) is explanatory drawing which shows the state which the main body part closed, FIG. 5 opened the portable terminal which concerns on this invention FIG.
A mobile terminal (folded mobile phone) 100 according to the present embodiment is generally configured by a main body A and a fashion cover B provided on the outer surface of the main body A.

  As shown in FIG. 1, the main body A is configured by fixing a housing composed of an upper housing 1 and a lower housing 2 and upper and lower housings 1 and 2 between the upper and lower housings 1 and 2. And a connecting device 3 that can be bent.

  Among these, the upper housing 1 includes a receiver (receiver) 11 that is a first audio output unit, a speaker 12 (see FIG. 5) that is a second audio output unit, a display unit 13, and a permanent magnet 14. The first printed circuit board 15 (see FIG. 5) and the like are accommodated. The first printed circuit board 15 is provided with an LCD or the like constituting the display unit 13.

  On the other hand, the lower housing 2 is detachable with a transmitter (microphone) 21, an operation unit 22, a vibrator unit 23 (see FIG. 5), a camera unit 24 (see FIG. 5), and a hall element 25. The battery 26 (see FIG. 5) and the second printed circuit board 27 (see FIG. 5) are accommodated. The second printed circuit board 27 is mounted with a transmission / reception unit, a data conversion unit, an audio processing unit, an image processing unit, an information recording unit, a control unit, and the like.

  The connecting device 3 is configured to fix the upper and lower housings 1 and 2 sandwiching a bendable connecting portion, and is mainly composed of a sheet-like member and a flexible member, and an antenna 34 (see FIG. 4) and a flexible wiring member (for example, a flexible substrate) 35 is accommodated.

  The connecting device 3 connects the lower end surface side of the upper housing 1 and the upper end surface side of the lower housing 2, and the connecting device 3 is bent by the connecting portion 3A in the direction of arrow P in FIG. And bendable in the opposite direction. That is, when not in use, as shown in FIG. 4B, the main body A is folded, that is, the upper housing 1 is folded to face (oppose) the lower housing 2. On the other hand, at the time of use, as shown in FIG. 4A, the main body A is opened so that the user's face faces the upper housing 1 and the lower housing 2.

  The receiver 11, which is a receiver, is provided on the main surface 1A of the upper housing 1 that faces the lower housing 2 when the main body A is closed, and is arranged so that sound is output from the main surface 1A. . When the folded mobile phone 100 according to the present embodiment is normally used, the voice of the communication partner is output. On the other hand, the speaker 12 shown in FIG. 5 is provided on the back surface 1B opposite to the main surface 1A of the upper housing 1 and outputs a ring tone from the back surface 1B when waiting for mail or telephone. It is arranged to do.

  The microphone 21 and the operation unit 22 of the transmitter are provided on the main surface 2A of the lower housing 2 that faces the main surface 1A of the upper housing 1 when the main body A is closed. The vibrator unit 23 notifies the incoming call by vibration by oscillating the incoming call.

  The camera unit 24 is provided on the back surface 2B opposite to the main surface 2A of the lower housing 2 along with a battery 26 that can be attached to and detached from the lower housing 2, and a subject behind the operation unit 22 Can be imaged. Incident light from a subject captured by the camera unit 24 passes through a lens group, is converted from an optical signal to an electrical signal by a photoelectric conversion element such as a CCD (charge coupled device), and image information is generated. After this image information is processed by the image processing unit, an image is generated on the display unit 13.

  The hall element 25 is a means for detecting the magnetic field of the housing permanent magnet 14 and is provided on the second printed circuit board 27 so as to face the housing permanent magnet 14 when the main body A is closed. ing. The Hall element 25 detects the magnetic field of the casing permanent magnet 14 and outputs a detection signal to the control section because the casing permanent magnet 14 is in the close state when the main body A is closed. . In addition, the Hall element 25 generates a detection signal because the permanent magnet 14 for the casing is separated if the main body A is in an open state, and the magnetic field of the permanent magnet 14 for the casing cannot be detected. do not do.

  That is, the main body A is in a closed state when the Hall element 25 detects the casing permanent magnet 14, and is open if it cannot be detected. In the folded type mobile phone 100 according to the present embodiment, when the case is closed, nothing is displayed on the display unit 13 in the reception standby state, and power is not consumed. In addition, illumination means (not shown) for illuminating the display unit 13 does not emit light. In the open state, a mark indicating the received electric field strength, remaining battery capacity information, time information, incoming call information, and the like are displayed, and illumination by the illumination means is performed.

  The connecting device 3 is bent when the main body part A is closed, and is released from the bent state when the main body part A is opened. The connecting device 3 has flexibility and is vertically separated with the connecting part 3A at the center part therebetween. A sheet-like member that secures the two cases 1 and 2 and a restoring force and rigidity that return to a flat state (the state before the bend) when bent, and a flexibility that fixes the upper and lower cases 1 and 2 And a member. As shown in FIG. 5, the connecting device 3 includes a first connecting member 31, a second connecting member 32, and a third connecting member 33. Among these, the 1st connection member 31 and the 3rd connection member 33 comprise a sheet-like member, and the 2nd connection member 32 comprises the bendable member.

  The first connecting member 31 forms a surface in the same direction as the main surface 1A of the upper housing 1 and the main surface 1B of the lower housing 2, and at the same time, the outer surface of the upper housing 1 and the outer surface of the lower housing 2 The surface is integrally formed (the outer surfaces of the upper and lower casings 1 and 2 are also used). The 2nd connection member 32 is provided ranging from the upper housing | casing 1 to the lower housing | casing 2, and is formed with the thin plate-shaped steel materials (carbon tool steel material, stainless steel, etc.) which have flexibility and rigidity. The third connecting member 33 is attached to the first connecting member 31 so as to integrally connect the back surface 2B of the lower housing 2 and cover the second connecting member 32 and the flexible wiring member 35.

  The first connecting member 31 and the third connecting member 33 are made of a flexible material such as thermoplastic polyester / ether / elastomer or polyurethane resin. Moreover, the material which forms this 1st connection member 31 and the 3rd connection member 33 is not restricted to the material mentioned above, What is necessary is just to form in a sheet form with the material which has flexibility and elasticity.

  The inner surface 1C of the main surfaces 1A and 2A of the upper and lower casings 1 and 2 formed by the first connecting member 31 is made of an inner surface portion 1C using another material such as ABS resin different from the forming material of the main surfaces 1A and 2A. 2C is formed. That is, the upper housing 1 and the lower housing 2 are integrally configured by a different material molding method (for example, insert molding or the like) integrally formed of different materials. In the present embodiment, the outer surfaces of the upper casing 1 and the lower casing 2 formed of thermoplastic polyester / ether / elastomer (actually, the first connecting member 31) 1A, 2A, A window frame portion 13A formed of ABS resin is integrally formed.

  As shown in FIG. 4, the second connecting member 32 extends linearly from the upper housing 1 toward the lower housing 2, and the cross-sectional shape thereof is an arc shape with a thin plate having a width W <b> 1 and a curvature R <b> 2. Is formed. The center of the curvature R2 is on the main surface 1A side of the upper housing 1 (or the main surface 2A side of the lower housing 2), and this center is indicated by a point O.

  As shown in FIG. 4A, in the state where the connecting device 3 of the main body A is opened, the second connecting member 32 is lowered from the upper housing 1 while maintaining the circular arc shape of the curvature R2 from one end to the other end. It extends linearly toward the housing 2 and maintains a stable state. Here, even if it is going to bend in the direction opposite to the arrow P in order to further open (expand) from the state in which the coupling device 3 of the main body part A is opened (the state in FIG. 1), a curved state is formed. The rigidity in the direction of releasing the curved state (further releasing the main body part A from the flat open state) is enhanced, and a force for holding the open state (hereinafter referred to as “ This is called “curvature holding force”). Therefore, the force (reverse bending force) required to open the main body part A in the direction of further opening the main body A from the open upper body, that is, the convex back curved surface (positive curved surface) direction opposite to the concave curved surface (negative curved surface) direction. Is much larger than the force (folding force) required to close the main body in the P direction, so it is difficult to bend. This difficulty in bending is determined from the fixing method of the second connecting member 32, the second moment of section, the Young's modulus, and the like.

  On the other hand, when bent in the direction of arrow P (see FIG. 5) with a predetermined force or more, the central portion of the second connecting member 32 bends in the direction in which the connecting device 3 of the main body A closes due to the jumping phenomenon. If the applied force is eliminated without plastic deformation, the restoring force restores the original flat open state, and the connecting device 3 of the main body A returns to the open state. That is, the 2nd connection member 32 functions also as a means which prevents that the easy bending operation | movement to the arrow P direction is performed from the state by which the main-body part A was opened.

  Therefore, when the main body A is opened, the first, second, and third connecting members 31 to 33 are in a straight (straight) open state, and this state is maintained by the rigidity of the second connecting member 32. When the lower housing 2 is held in the hand, the upper housing 1 is kept stationary and remains stationary, does not bend in the direction of the arrow P, and does not hang down in the opposite direction. Moreover, the main body A can be easily closed.

Next, the fashion cover B will be described.
The fashion cover B covers a base member 4A (see FIG. 5) as a base material and the outer surface of the base member 4A, natural fibers such as cotton and linen, synthetic fibers and leather members made of acrylic, nylon, urethane, etc. The outer appearance portion 4B is made of a fashionable material (outer skin), and the edge winding portion 4C is formed by connecting the same material to the outer peripheral surface of the base member 4A.

  The base member 4A is formed of an appropriate material having flexibility, such as thermoplastic polyester, ether, elastomer, and polyurethane resin. On the inner surface of the base member 4A, an upper housing back surface portion (back surface) 4D that forms the back surface 1B of the upper housing 1 and a battery cover portion 4E that covers the battery 26 are integrally formed of ABS resin. . That is, the base member 4A is also made of a different material. Further, in order to form a bendable protrusion that protrudes outward from the outer shape of the casings 1 and 2 when the back surface of the base member 4A is mounted on the upper and lower casings 1 and 2, a curved portion is formed at the center. 4F is provided.

  A lower hole 332 </ b> B is provided in the upper housing rear surface portion 4 </ b> D and is screwed to the upper housing 1 by a tapping screw 29. The fashion cover B is detachably attached to a hooking claw 2D formed on the lower housing 2 with an engaging claw 4G as an engaging part formed on, for example, the battery cover part 4E of the base member 4A. When the inner surface side of the base member 4A is attached to the main body portion A, the curved portion 4F is separated from the connecting portion 3A.

  The outer appearance part 4B (outer skin) provided on the outer surface of the base member 4A is positioned by adhering and fixing the outer skin 4B to the base member 4A in advance in order to prevent the outer skin 4B from moving relative to the base member 4A. Is done. Next, the belt member 6 is sewn to the outer skin 4B together with the base member 4A with a thread, and then the edge winding portion 4C is sewn to the outer skin 4B together with the base member 4A with the thread 5B. When the edge winding portion 4C is sewn, a flat portion is secured by a predetermined distance from the end surface of the base member 4A in order to press the material with the sewing machine and feed the material.

  The external portion 4B is provided with a first opening 4H that allows the sound output from the speaker 12 to pass therethrough and a second opening 4J that opens in front of the camera unit 24. As described above, the outer skin 4B is sewn after being attached to the base member 4A. Affixing before sewing stabilizes the sewing position and prevents movement (displacement) of the external portion with respect to the base member 4A when grasped, so that the camera part 24 is covered by the displacement during grasping. This prevents the camera from being unable to shoot, and does not make the hand holding it feel uncomfortable.

  Further, a magnetic metal fitting 6B having one end sewn and a convex portion 6A formed in the center is provided on one end side (near the back side of the battery cover) of the appearance portion 4B of the fashion cover B. A belt member 6 is attached. Further, an engaging portion 4M having a second permanent magnet 4K (see FIG. 5) inside and having a recess 4L formed in the center is provided on the other end side of the exterior portion 4B (near the back side of the receiver). Yes.

  Thereby, when the main body part A is closed, the belt member 6 can be bent and the metal fitting 6B can be attracted and engaged with the engaging part 4M provided near the other end part of the appearance part 4B. At this time, the edge winding portion 4C falls in the direction approaching the main body portion A, and the belt member 6 is stretched while being bent, so that the metal fitting 6B and the engaging portion 4M are engaged, and the main body portion A is substantially in close contact. So that it is closed.

  Thus, when the main body part A is closed, the main body part A tries to open by the return force F2 of the second connecting member 32, but the metal part 6B engages with the engaging part 4M, so that the main body part A Even if the return force F2 is applied, the main body A can be prevented from being opened.

  Note that when the engagement between the metal fitting 6B and the engaging portion 4M is released, the tip of the belt member 6 may be pulled up. That is, when a force that pulls out the convex portion 6A fitted in the concave portion 4L is applied, the engagement is easily released. When the return force F2 is applied to the main body portion A in the engaged state, the convex portion 6A is only moved in the radial direction of the concave portion 4L and thus cannot be easily removed. The return force F2 of the second connecting member 32 is set to be smaller than the weight of the upper casing 1 or the lower casing 2 itself with the main body A closed, so that the folding can be performed without using the belt member 6. You may comprise so that a state can be hold | maintained.

  Alternatively, the metal fitting 6B of the belt member 6 may be provided with a concave portion 4L, and a convex portion 6A may be provided on the other end side of the external appearance portion 4B so that both are attracted and engaged by magnetic force.

FIG. 6 is a perspective view showing a laminated structure of the rear surface of the housing and the fashion cover.
The folding cellular phone 100 according to the present embodiment is provided with means for lowering the peak temperature of a heat source (such as a wireless power amplifier, a charge control component, and a CPU) by dissipating local concentrated heat. . The folding cellular phone 100 connects an upper casing 1 having a display unit 13 (liquid crystal unit) and a lower casing 2 having a key operation unit 22 by a connecting device 3 made of a spring metal plate and an elastomer, and an exterior unit. Has a fashion cover B made of cloth and leather stitched with elastomer. That is, at least the back surfaces of the upper housing 1 and the lower housing 2 are covered with the fashion cover B. In FIG. 6, 30 represents a structural portion made of an elastomer or an ABS resin.

  In such a deposition / lamination structure, the heat diffusion sheet member 41 is provided between the back surfaces of the casings 1 and 2 and the fashion cover B by being sandwiched or adhered. The heat diffusion sheet member 41 may be provided on either the housing 1 or the housing 2 or may be provided over both of them. As this thermal diffusion sheet member 41, a conductive thermal diffusion sheet (graphite sheet, ceramic sheet, thermal conductive resin, etc.) can be suitably used. The heat diffusion sheet member 41 may be a cloth on which a conductor is vapor-deposited. Further, the heat diffusion sheet member 41 may be a corrugated sheet member or a punching sheet member having a large number of holes in order to secure a large heat radiation area.

  The thermal diffusion sheet member 41 can be provided between the fashion cover B and the ABS resins of the casings 1 and 2 as shown in FIG. More specifically, the heat diffusion sheet member 41 can be attached to the back surface of the first printed circuit board 15. On the other hand, for example, a wireless power amplifier PA that is a heat source has a heat radiating surface 36 exposed on the back surface of the first printed circuit board 15, for example. The heat diffusion sheet member 41 is connected by being in close contact with the heat radiating surface 36. In the figure, 39 represents a fixing means for the heat diffusion sheet member 41. In the example of FIG. 7A, the heat diffusion sheet member 41 connected to the heat radiating surface 36 on the back surface of the first printed circuit board 15 extends over the lower housing 2.

  In addition, the heat diffusion sheet member 41 is attached to the upper housing back surface portion 4D between the upper housing back surface portion 4D and the base member 4A, or is attached to the back surface 2B between the back surface 2B and the base member 4A. You may stick. In this case, the radio power amplifier PA is connected to the thermal diffusion sheet member 41 through the upper housing rear surface portion 4D or the rear surface 2B so that the heat radiation surface 36 is exposed. As will be described later, a metal pin is erected on the heat radiating surface 36 of the wireless power amplifier PA, and the metal pin penetrating the upper housing back surface portion 4D or the back surface 2B is connected to the heat diffusion sheet member 41. Also good. Alternatively, the heat radiating surface 36 and the heat diffusion sheet member 41 may be in close proximity. Further, the heat diffusion sheet member 41 may be attached to the bottom plate portion 28 (see FIG. 3) of the lower housing 2 and connected to the heat radiation surface 36 exposed on the bottom plate portion 28.

  As described above, in the folded type mobile phone 100 according to the present embodiment, when the wireless power amplifier PA, which is a heat generation source, generates heat, the heat is transmitted to the heat diffusion sheet member 41 and is diffused in the surface direction to be radiated. Therefore, heat that has been locally concentrated in the past is diffused, and the peak temperature of the wireless power amplifier PA is lowered. In addition, since the heat diffusion sheet member 41 is accommodated using the gap between the back surfaces of the casings 1 and 2 and the fashion cover B, the heat diffusion sheet member 41 having a large area and high heat dissipation efficiency can be folded and portable. The telephone 100 can be accommodated without affecting the appearance (design).

Next, the operation of the bent type mobile phone 100 of this embodiment will be described in detail.
In the folded type mobile phone 100 of the present embodiment configured as described above, when not in use, the upper housing 1 and the lower housing 2 are closed by being closed by the belt member 6 so that the connecting portion Although the bent state is maintained at 3A, when the engagement state between the metal fitting 6B of the belt member 6 and the engagement portion 4M is released for use, the main body portion A is opened by the return force F2 of the second connecting member 32. Accordingly, it returns to a substantially flat state and stops, and this open state is stably held by the curved holding force (action) of the second connecting member 32.

  On the other hand, when not in use (in a reception standby state), a closing force F1 or more is applied to the main body A so that the main surface 1A of the upper housing 1 and the main surface 2A of the lower housing 2 face each other, and the belt member 6 can be engaged with the engaging portion 4M, and the main body portion A can be closed. In a state in which the main body A is closed, the curved portion 4F of the fashion cover B is bent slightly while approaching the third connecting member 33, and the edge winding portion 4C approaches the upper and lower housings 1 and 2 Therefore, the projection area in the vertical direction with respect to the main surfaces 1A and 2A of the upper and lower casings 1 and 2 is minimized, which is suitable for portability.

  When the main body A is closed, the thinnest portion (concave portion) 33B of the third connecting member 33 is expanded (see FIG. 5), and the central portion of the second connecting member 32 corresponding to the connecting portion 3A is Flatten. At this time, a force is applied to the thinnest portion 33B of the third connecting member 33 so as to cancel the expanded state of this portion, and the central portion of the second connecting member 32 attempts to return from a flat shape to a curved shape. However, as described above, when the metal fitting 6B provided on the belt member 6 of the first connecting member 31 of the fashion cover B is engaged with the engaging portion 4M, the closed state is maintained. Maintained.

Here, the operation when the fashion cover B is attached to the main body A will be described with reference to FIGS. 3 and 5.
As shown in the figure, first, the upper casing 1 of the main body A is assembled to the upper casing rear surface portion 4D of the fashion cover B. Next, the fashion cover B is pulled in the direction of arrow T so that the curved portion 4F of the fashion cover B is substantially flat. The state pulled in the direction of arrow T is indicated by a two-dot chain line. If the fashion cover B is moved in the direction opposite to the arrow T direction while the engagement claw 4G formed on the battery cover portion 4E of the fashion cover B is hooked on the hook claw 2D formed on the main body portion A, The mating claw 4G and the hooking claw 2D are engaged, and the attachment of the fashion cover B to the main body A is completed.

  As another method, after assembling the upper casing 1 of the main body A to the upper casing rear surface portion 4D of the fashion cover B, the fashion cover B is changed to the arrow by further expanding the main body A in the direction of arrow P. An extra length sufficient to move in the T direction is generated. Thereafter, as described above, when the fashion cover B is moved in the direction opposite to the arrow T direction while the engaging claw 4G is hooked on the hooking claw 2D formed on the main body A, the pulling with the engaging claw 4G is performed. The hook 2C is engaged, and the attachment of the fashion cover B to the main body A is completed.

  As described above, the fashion cover B can be easily attached to and detached from the main body A by providing the fashion cover B with the curved portion 4 </ b> F or expanding the connecting device 3. Moreover, the operation method is extremely simple.

  Moreover, according to this embodiment, since the 1st connection member 31 was set as the structure which connected the upper housing | casing 1 and the lower housing | casing 2 continuously, the upper and lower housings 1 and 2 are provided with a sense of unity. Can do. If the fashion cover B can be attached to and detached from the upper housing 1 (similar to the battery cover), the user can freely replace the fashion cover B according to his / her preference. It is possible to provide a unique folded mobile phone 100 according to the user's preference. Of course, when the fashion cover B becomes dirty, it can be replaced and washed, so that freshness and cleanliness can always be maintained.

  Therefore, according to the folded-type mobile phone 100 according to the present embodiment, the heat diffusion sheet member 41 is provided between the back surfaces of the casings 1 and 2 and the fashion cover B, and the heat diffusion sheet member 41 is provided in the casing 1. 2, when the wireless power amplifier PA generates heat, the heat is transmitted to the thermal diffusion sheet member 41 and diffused in the surface direction to be radiated. As a result, the heat locally concentrated in the past is diffused, and the peak temperature of the wireless power amplifier PA can be lowered without affecting the appearance of the folded mobile phone 100.

  In the above embodiment, the heat diffusion sheet member 41 is described as an example of the configuration in which the heat diffusion sheet member 41 is attached to the first printed board 15, the upper housing back surface portion 4D, the bottom plate portion 28, or the back surface 2B. In such a folding cellular phone, a heat diffusion sheet member may be provided on the base member 4A which is a base material of the fashion cover B. In this case, as shown in FIG. 7B, a metal pin 37 having a high thermal conductivity is erected on the heat radiation surface 36 of the wireless power amplifier PA. Then, by connecting the metal pin 37 penetrating the first printed circuit board 15, the upper housing back surface portion 4D, the bottom plate portion 28, or the back surface 2B to the heat diffusion sheet member 41, the heat from the wireless power amplifier PA is generated. It is possible to conduct heat to the heat diffusion sheet member 41 through the metal pin 37 and dissipate heat.

  According to this modification, the heat diffusion sheet member 41 is provided on the base member 4A, and the heat diffusion sheet member 41 is connected to the wireless power amplifier PA. Is transmitted to the heat diffusing sheet member 41, diffused in the surface direction and radiated. Therefore, the heat that has been concentrated locally in the past is diffused, and the peak temperature of the wireless power amplifier PA is reduced without affecting the appearance (design) of the folded mobile phone 100. Can do. In addition, since the heat of the wireless power amplifier PA is diffused by the heat diffusion sheet member 41 provided on the fashion cover B, the number of parts and the part cost of the folding mobile phone 100 are not increased.

  In the above embodiment, the case where the thermal diffusion sheet member 41 is a cloth on which graphite and a conductor are vapor-deposited has been described as an example. However, the thermal diffusion sheet member is a mesh-like sheet made of metal. May be. In this case, as shown in FIG. 8, a mesh sheet 45 may be surrounded by a cushioning material (for example, sponge) 43 having air permeability, and the mesh sheet 45 may be brought into contact with the heat radiation surface 36 of the wireless power amplifier PA. . By adopting such a configuration, it is possible to ensure air permeability for heat dissipation by the cushion material 43 while ensuring thermal conductivity by the mesh sheet 45.

  In addition, as the thermal diffusion sheet member, a double sheet material having a hollow layer encapsulating a gel material having a high thermal conductivity may be used. According to such a gel encapsulating sheet material, it is possible to improve the feel when the folded mobile phone 100 is gripped, and to further promote the thermal diffusion by the flow of the encapsulating gel generated at the time of gripping. it can. A ceramic sheet may be used. In the case of a ceramic sheet, heat diffusion can be further promoted because it has a feature of converting heat into far infrared rays and radiating it.

  Further, in the above-described embodiment, the fashion cover B is provided with the upper housing back surface portion 4D and the battery cover portion 4E, and the fashion cover B is connected to the housing 1 via the upper housing back surface portion 4D and the battery cover portion 4E. However, the fashion cover may not be provided with the upper casing back surface portion 4D and the battery cover portion 4E, and may be configured only by the base member 4A and the external appearance portion 4B. . In the case of the fashion cover B1 having such a configuration, as shown in FIG. 9, an engaging portion 45 having the same surface extending from the rear surfaces of the casings 1 and 2 in a bowl shape is provided around the fashion cover B1. An elastic wire (rubber or the like) 49 is provided on the periphery of the engagement opening 47. The fashion cover B1 can be easily attached to the back side of the casings 1 and 2 by expanding the engagement opening 47 against the elastic force of the elastic wire 49 and covering the engagement portion 45. .

It is a perspective view which shows the external appearance of the portable terminal which concerns on this invention. FIG. 2 is an exploded perspective view of FIG. 1. It is the perspective view which looked at the main-body part of FIG. 1 from the back surface. (A) shows the main body of the portable terminal according to the present invention in an open state and a connecting device provided on the main body, and (b) is an explanatory view showing a state in which the main body is closed. It is center sectional drawing when the portable terminal which concerns on this invention is opened. It is a perspective view showing the laminated structure of the back surface of a housing and a fashion cover. It is sectional drawing which represented the example of a connection of the power amplifier for radio | wirelesses, and a thermal-diffusion sheet | seat member with (a) (b). It is the principal part enlarged view showing the example of a connection of the power amplifier for radio | wirelesses, and a mesh sheet. It is sectional drawing showing the modification of a fashion cover.

Explanation of symbols

1, 2 Housing 2B Back side of lower housing (back side)
4A Base member (base material)
4D upper housing back (back)
13 Display unit 22 Operation unit 28 Bottom plate (back)
41 Thermal diffusion sheet member 100 Folding type mobile phone (mobile terminal)
B Fashion cover (mobile terminal cover)

Claims (2)

A display unit and an operation unit are disposed on the surface of the housing, and at least the back surface of the housing is a mobile terminal covered with a mobile terminal cover,
A thermal diffusion sheet member is provided between the rear surface of the housing and the portable terminal cover,
A portable terminal, wherein the heat diffusion sheet member is connected to a heat source provided in the housing. A cover for a mobile terminal that covers at least the back surface of a housing in which a display unit and an operation unit are arranged on the front surface,
A heat diffusion sheet member is provided on the substrate,
A cover for a portable terminal, wherein the heat diffusion sheet member is connected to a heat source provided in the casing.

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